ANALYSIS OF ACOUSTIC ELEMENTS AND SYNTAX IN COMMUNICATION SOUNDS EMITTED BY MOUSTACHED BATS
ANALYSIS OF ACOUSTIC ELEMENTS AND SYNTAX IN COMMUNICATION SOUNDS EMITTED BY MOUSTACHED BATS
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DOI:
10.1121/1.410273
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发表时间:
1994-09-01
影响因子:
2.4
通讯作者:
SUGA, N
中科院分区:
文献类型:
--
作者:
KANWAL, JS;MATSUMURA, S;SUGA, N
Mustached bats, Pteronotus parnellii parnellii spend most of their lives in the bark and use their auditory system fbr acoustic communication as Reil as echolocation. The sound spectrograms of their communication sounds or ''calls'' revealed that this species produces a rich variety of calls. These calls consist of one or more of the 33 different types of discrete sounds or ''syllables'' that are emitted singly and/or in combination. These syllables can be further classified as 19 simple syllables, 14 composites, and three subsyllables. Simple syllables consist of characteristic geometric patterns of CF (constant frequency), FM (frequency. modulation), and NB (noise burst) sounds that are defined quantitatively using statistical criteria. Composites consist of simple syllables or subsyllables conjoined without any silent interval. Most syllable types exhibit a large intrinsic variation in their physical structure compared to the stereotypic echolocation pulses. Syllable domains are defined on the basis of multiple parameters; although these can be collapsed onto three dimensions that capture 99% of the measured variation among different types of syllables. Temporal analysis of multisyllabic constructs reveals several syntactical rules for syllable transitions.